Container filler for liquids



Aug. 15, 1939 c. w. voGT CONTAINER FILLER FOR LIQUIDS Filed Feb. 2'7, 1936 4 Sheets-Sheet 1 L14 INVNTOR CLARENCE 144 V067' ATTORNEYS Aug. l5, 1939 c. w. voGT CONTAINER FILLER FOR LIQUIDS Filed Feb. 27, 1936 4 Sheets-Sheet 2 INVENTOR CLARENCE W. V067 BY MMM ATTORNEYS C. W. VOGT Aug. 15, 1939 CONTAINER FILLER FOR LIQUIDS Filed Feb. 27, 1936 4 Sheets-Sheet 3 nllilllIIIIIIIIIIIIIIIIII., d

Aug. 15, 1939 C, w. VOGT 2,169,573

CONTAINER FILLER FOR LIQUIDS ATTORNEYS Patented Aug. 15, 1939 UNITED STATES PATENT oFFicE coN'rAmER FILLER Fon LIQUms Application February 27, 1936, Serial No. 65,953

8 Claims.

This invention relates to machines for filling containers with liquids, and more particularly to that type in which a series of containers may be fed in succession in proper relationship to the filling apparatus and iilled and sealed while in transit.

In my improved machine there is provided a plurality of measuring chambers filled in succession and permitted to discharge in succession into separate successive containers so that there will be a predetermined amount of liquid delivered to each container regardless 4of any possible slight variation in the size of the containers. In the use of a machine of this character 1l theamount of liquid delivered from a lled measuring chamber within the allotted time and after the' opening of the discharge valve, will vary dependent upon the viscosity of the liquid or the extent to which it tends to adhere to the zo Wall of the chamber. Even though the measuring chamber be completely lled before the discharge valve is opened, this amount will vary with the meniscus of the liquid, and upon opening the dischargevalve the amount of liquid delivered may vary dependent upon the amount of liquid which adheres to the Wall or which ilows only slowly over or from said wall.

The main object of the present invention is to provide a very simple and effective means whereby the amount of liquid in the measuring chambers may be varied at will and in accordance with j the viscosity or other characteristic of the liquid.

It has been proposed to use compensating mechanism in connection with each chamber to control the volume of liquid therein.

In my improved apparatus I avoid the use of any such compensating mechanism and automatically control the liquid content of each measuring chamber without the necessity for any moving parts associated with the chamber.

In my improved apparatus the measuring chambers and the containers travel in a circular path, and the axis of rotation of the main moving parts of the apparatus is inclined from the vertical to such an extent that during one part of the path of movement of the measuring chambers they move into a main body of liquid so as to become filled, and at another part of the path of movement they are at least in part above the level of the liquid in said body.

As an important feature of my invention I provide means whereby the measuring chambers, while above the level of the body of liquid supply. will be tilted to the desired degree, and the a'mQunt 0I liquid in @ach chamber delfmlied by the extent of such tilting. Thus for a highly viscous liquid there may be a smaller tilt than for a less viscous liquid, and as a result the larger amount of more viscous liquid in the measuring chamber when the discharge valve is 5 open will compensate for the larger amount of such viscous liquid which will adhere to the wall. For a thinner or less viscous liquid, all of which freely flows from the measuring chamber, the latter would be tilted to a greater degree so that 10 there will be a smaller initial supply.

As a further important feature all of the measuring chambers are rigidly connected to the main rotating frame of the machine, the axis of the entire machine being tilted so as to simulll taneously tilt all of the measuring chambers to the desired degree.

As examples of liquids of diierent viscosity, different meniscuses, or which adhere to the walls of the measuring chamber to a diierent degree, 20 I may mentioncream and milk, or lubricating oils of different grades. For each liquid there would be a predetermined angle of inclination to insure the delivery of a uniform amount of the liquid.

So far as concerns the main feature of my 25 invention, the apparatus may be designed for delivering a predetermined amount of liquid to any desired type of container, such as a bottle, can, carton, bag or the like. In the preferred form hereinafter described, the apparatus is designed for illling the type of container disclosed and claimed in copending application Serial No. 43,995, in which the .liquid is retained byl a thin iiexible walled bag disposed in a carton and the bag has a ap or pleat comprising apairof plies or walls normally disposed in closely juxtaposed parallel positions and which may be bent in opposite convex curves to form a lling opening therebetween. 'Ihe delivery spout of the apo paratus may be caused to enter the opening and hold the walls apart during lllng. j

As a further feature of my invention I provide means for sealing together the wallsdening the lling opening after the predetermined 45 volume of liquid has been delivered,"said sealingmeans being operated by and timed with the mechanism for effecting the measuring and discharging operations. 4 l

The walls of the bag are preferably formed of 50 a material capable of beingheat sealed without the necessity of using adhesive or a separate closure member, and the sealing of the container is effected merely by heating and pressing t0- gether the walls of the iiap as thelled container 55 moves along after the removal of the spout from between said walls.

My improved machine embodies various other features of importance which will be pointed out more particularly hereinafter in connection with the description of a preferred embodiment of the invention.

In the drawings:

Fig. 1 is a side elevation of the machine, a portion of the wall of the supply tank being broken away,

Fig. 2 is an enlarged vertical section showing a container in filling position in respect to the measuringy chamber,

Fig. 3 is a transverse section on the line 3--3 of Fig. 2,

Fig. 4 is a top plan view, portions being broken away at diierent planes,

Fig. 5 is a vertical section taken on the line 5-5 of Fig. 4,-

Fig. 6 is a detail showing the position of the container as it is brought into registry with the measuring chamber and taken on the line 6-6 of Fig. 4,

Fig. '7 is a detail taken on the line 1-1 of Fig. 4 and showing the container and measuring chamber in another position,

Fig. 8 is a face view of one of the container supports,

Fig. 9 is a transverse section through a portion of the machine, said section being taken on the line 9-9 of Fig. 8,

Fig. 10 is a sectional detail on the line Ill-I0 of Fig. 5, f

Fig. 11 is a top plan view of the sealing means shown at the upper side of Fig. 4, but on a large scale,

Figs. 12 and 13 are sections on the lines I2--I2 and I3-I3 respectively of Fig. ll,

and

Fig. 15 is a top plan view of the container, the

kflap or pleat being shown in section.

` In the construction'illustrated there is a base I8 provided with means whereby it may be tilted to a limited extent in respect' to 'the horizontal. Preferably it has a three p oint support in the form of a pair of legs II which may be pivoted on a bedplate I2 and a rthird leg I3 provided with ymeans for raising or lowering the lower end thereof in respect to a bedplate I4. The adjusting means is shown as a screw rod I5 having a ball and socket connection with the bedplate I4 and threaded engagement with a trunnion I6 rotatably supported in the lower end of the leg I3. T he screw rod I5 which forms an extension .of the leg I3 may be rotated to vary the total 'eiectivelength of thecombined leg by means of a handle I1, and the Iangle of theresulting tilt maybe indicated by a pointer disc I8 juxtaposed to a scale I9 on the side of the leg I3.

Theybase :Illservesto'rotatably support the main frame of thema'chine. This frame is shown l vas includinga ,base frame member 28, an annular seriesiof upwardly extending rods ',2I, and an ,upper supply tank 22. frame member-,20 arey connected ,so as'to permit The. Ibase I8 and. the

this'rotation. '.Asshown'the ybase has a central upwardly. facing lsocket 23,' and the frame mem- .ber `2li has a central downwardly facing socket 24 receiving an axleor'pivotfrod` 25. The base ,IIIA and theframe .member `20 4cooperate to form a casing for the means employed to rotate the rods.

main frame and to control the liquid delivery valves. l

The base is shown as having an upwardly extending peripheral ange 26, and the frame 20 is provided with an inwardly extending flange 21, the parts 26 and 21 cooperating to permit rotationof the parts III and 28, but normally prevent relative vertical movement.

The frame member 20 has a depending flange 28 within the casing and provided with a worm 1 wheel 29 which engages a worm on a transverse shaft 3l! journaled inthe wall 26 at one side thereof. Thus by rotating the shaft 30 the frame 20 and all parts carried thereby are rotated about the pivot 25 as a center. The shaft 38 may be 1 driven bya flexible shaft or by a motor mounted on the bottom of the gear casing and connected by a variable speed drive.

Within the casing there is also provided an annular cam flange 3I mounted on the base 28 and provided with a peripheral cam groove 32 in whichl travel rollers 33 secured tov rods 34 vertically slidable in suitable bearings or guides 35 in the frame member 20.

The supply tank 22 is mounted on an upper frame member 20a which, in turn, is supported from and rigidly secured to the lower frame member 2 0 by the vertical rods 2|. Preferably these rods are shouldered at each end to seat on the two frame members 20 and 20a, and the parts 3 are rigidly connected by nuts on the ends of the The tank is of light sheet metal andy carries a series of depending measuring vchamber 36, each of which is open at its upper end into the supply tank. Means are provided for main- 3 taining a fairly definite liquid level within the supply tank and this level is such that due to the inclination of the axis 25 the measuring chambers will have their upper ends below the liquid level during a part of their path of movement 4 around the axis and will have their upper ends above said liquid level at another portion of the path of movement. Thus during the rotation each measuring chamber will pass beneath the liquid so that it will be filled and will then pass 4 above the liquid level.

Any suitable 'means may be employed for maintaining this liquid level. As shown" the tank 22 is provided with a cover 31 and through the center of the latter extends a delivery pipe 39 have 5 ing a oat controlled valve 39 at the lower end thereof. The pipe is preferably held against rotation so that the float 40 will remain on the downwardly inclined side of the center of rotation. j 5

If it is desired to "employ gas pressure for facilitating the rapidvdelivery of the liquid from the measuring chambers the tank 22 may be gas tight.v As shown the pipe 38 has packing gaskets 4I engaging the upper and lower sur- 6 faces of the cover 31 to form a substantially gas tight seal, and the upper end of the pipe 38 is provided with a gas supply pipe 42 communieating with a passage 43 leading to the interior of the tank. The pipe may" be held 6 vez sagainst rotation not only by the pipe 42, but

by the liquid supply -pipe connected to and extending at right angles from the upper end of thel pipe 38. Additional means may be em ployed for preventing rotation if desired, and'7i the packing gaskets 4I may `be adjusted by a' .collar threaded on the portion of the pipe The upper end of each measuring chamber is gether and may be folded down and retained in preferably in a plane at right angles to the axis of rotation and therefore as each measuring receptacle is filled and moves above the liquid level the liquid in the chamber will beat the same angle in respect to the upper edge of the chamber as is the axis of rotation in respect to the vertical. With the axis substantially vertical each measuring chamber will be substantially completely filled, but the greater the inclination the more of the liquid can fiow out over the edge of the chamber and the less will be the quantity remaining therein. This variation in quantity will vary with the area of the upper surface of the liquid in the'measuring chamber.

I do not desire to be limited to any specific shape of measuring chamber, but I preferably employ one which is comparatively large at its upper end so that comparatively small changes in inclination will give comparatively larger variations in the amount of liquid in the measuring chamber.

Preferably the measuring chambers are substantially conical with their largest end uppermost. This shape also facilitates the rapid discharge of the liquid from the measuring chamber when the valve at the lower end of the chamber is opened.

For controlling the discharge of the liquid from the measuring chamber a simple form of valve is a conical plug 41 vertically movable within the measuring chamber and adapted to fit in a valve seat or in the lower end of the conical chamber. Such a valve plug may be connected to a rod 55 extending up into the tank 22 above the liquid level therein and thence down through a guide tube 49 and the bottom of the tank. The rod 58 may be held in a central position in the chamber by a cross guide 58a. extending at right angles to the plane of the rod and guide 55. A separate cam operated rod 34 is provided. for each measuring chamber and upon the upper end of each rod there is provided a sleeve 55 with a projection i which may be moved into or out of alignment with the end of the valve rod i8 so that when the rod is lifted the projection 5I will engage the` valve rod and lift the valve from its seat so that the liquid may discharge through the lower end of the chamber, which by reason of the conical form constitutes a delivery spout or nozzle 52.

Each of the vertically movable rods 34 serves not only for opening the valve, but also for supporting the container to be filled. I do not wish to be limited to any specific type of container as my improved apparatus may be employed for filling glass bottles, tin cans, or any other form of liquid storage or shipping vessel, but for purposes of illustration I have shown my improved apparatus for use in filling containers of the A type disclosed and claimed in my copending application Serial No. 43,995. Such a container includes a. carton A having aninner lining of flexible slightly stretchable impervious sheet material B which latter is so designed as to form a iiap which may extend upwardly with two closely juxtaposed parallel walls C and D. The container may be iilled by separating these two iiaps and extending the nozzle end 52 between the two walls of the flap as shown particularly in Figs. 2 and 3. When the predetermined amount of liquid has been delivered into the container and the latter removed from the filling nozzle 52 the two walls of the flap will come tofolded position by the cover flap E of the carton.

Each valve operating and receptacle carrying rod 35 is provided with a support 53 for the con-v tainer, one or more side clamps or guides 54 and an opposed cam or guide 55. 'Ihe guide 55 is connected to the sleeve 5U which carries the valve operating member 5l. In placing the container into position to be filled the iilling opening of the container is telescoped onto the nozzle 52 and the clamp 55 is moved to'one side and the container held between the clamps 55 and 55, and preferably spaced above the support 53 as shown in Fig. 6.

During the rotation of the apparatus the cam groove at the proper time raises the rod 35 until the support 55 contacts with the bottom of the container and the valve operating member 5i raises the valve. Each container support 55 is provided with a collar 55 which is slidable upon the rod 55 and is normally held in an upper limiting position by a coil spring 5l', the lower end of which bears against the upper surface of a collar 57a which is fixed to shafts 35 by a pin or set screw. After the container support 53 has engaged the bottom of the container and has moved it upwardly to the position shown in Fig. 2y

where the upper rim of the nozzle is snugly socketed within the container opening, the further upward movement of the rod will result in compression of the spring so that there will be no breaking, jamming or distortion of the container.

The sleeve 50 is rotatable to a limited extent on the upper end of the rod 34 and is normally held in a predetermined position by a torsion spring 58. If there is no container in place between the clamps 55 and 55 then the spring 58 will hold the sleeve 55 in such position that the valve operating member 5l is out of alignment with the valve rod i5-and the valve is not opened during the upward movement of the rod 35. The placing of a container between the clamps 55 and 55 automatically rotates the sleeve 5@ to such a position that when the rod 35 comes up the valve will be opened.

The rods 2i which support the supply tank 22 also serve as guides for the upper ends of the rods 3d. The upper collar 55 of the container. support may be provided with lateral extensions 59 slidable along the opposite juxtaposed rods 2l as shown particularly in Fig. 5.

Although the containers are preferably placed in position by hand it will be evident that means might be provided for automatically delivering them to the rotating apparatus as each measuring chamber reaches a predetermined position in its path of movement. Preferably suitable means are provided for removing the containers from the apparatus after they have been filled. I have il lustrated such a mechanism in Figs, 4 and '7. As each filled container reaches a predetermined position in the path of movement, the container support is lowered and the valve closed. Due to the weight of the filled container it will move downwardly with the container Support and out of engagement with the delivery spout. Just beyond this point in the path of movement there is provided a curved channel shaped guide 6l! into which the containers'enter and along which they are moved to a limited extent by the clamp mem. ber 54 until they are disengaged from the latter due to the reverse curvature of the guide-60 and the path ofmovement of the contalner'support. As the containers are disengaged from the container support they are moved along the channel f the proper positioning of the container in the guide before the container leaves its support and clamping means. j

The wheel 6| is mounted on a shaft 81 journaled in a bracket 88 carried by the wall 26 of the gear casing. The lower end of the shaft carries a gear 68 meshing with the main gear 29.

'I'he apparatus illustrated is designed and proportioned for filling containers of the type shown in my application abovereferred to and is provided wit'h means for sealing together the two juxtaposed walls or plies C and D. These walls are laminated, the inner layer of each being of a heat sealing material, such as plioillm, and the outer layer of each being of paper or the like.

As the container is lowered and removed from the nozzle these walls come together in parallel positions as shown in Fig. 15 with the flap remaining in an upstanding or substantially vertical position and approximately in the plane of the outer side walls of the container.

For sealing these walls of the flap or pleat .and properly positioned in respect to the ngers 62 that they contact the outer surface of the outer wall D of the ilap as the container is being carried along by the wheel.

At one point in the path of travel of the con- I tainer is a member for engaging the surface of the other wall C and pressing the walls together against the heated member 1|. This is preferably in the form of a roller I2 which may be carried by an arm 'I3 journaled on the upper end of the shaft 61 and normally locked in proper position by a nut 'Il on a stationary bolt 'l5 carried by the bracket Il and extending through an arcuate slot I6 in the end of the arm 1l. The roller 'I2 is not secured directly to the arm 13 but is mounted in a bracket or extension." movable endwlse of the arm and pulled toward an inner limiting position by a spring 18. Thus as each container is carried along with the wall D of the ap in contact with theheated member 1I, the ap when it reaches 4the roher 12 has its two walls pressed together and pressed against the heater byL the roller and spring, and the two walls aresealed together to hermetically seal the container. The outer layer of each wall is not'softened or melted by the heat and pressure, but the heat and pressure are transmitted through the outerl layers to soften and seal the inner layers together and to the outer layers. 'I'he outer layers protect the inner layers from geirect contact with the pressing and sealing memrs. Any suitable means may be employed for heating the contact members 1l. As shown they are carried by but insulated from the' disc 10 and each contains an electric heating element. The heating elements have their terminals connected to two collector rings 10, which engage brushes 8l, I2 connected to the source offelectric current. The cam groove 32 is`of such shape as to eect the opening and closing ot the valves at the proper points in the path of movement. The

valves should close before the measuring chamber moves beneath the liquid vlevel in the tank 22 and should open after the measuring chamber moves above said liquid level. The cam may be so formed as to close the valve with a dropping and slight jarring vor even slight jamming action to insure tight closing and shaking off of the liquid in the nozzle below the valve.l This eliminates the necessity for any dripping period in the cycle. Dripping might be prevented by a small teat or extension on the valve and loosely fitting the lower end of the nozzle to retain the liquid by capillary action. The empty containers are brought into position and the lled ones are delivered from the apparatus in the part of the path of movement in which the measuring chambers have their upper ends beneath the liquid level in the supply tank.

As an indication of the sequence of operations eiected by means of the cam there is shown in Fig. 4 a line a indicating the maximum liquid level in the supply container. The empty containers are brought into position while a measuring chamber moves through the arc represented by the line b-c and are raised while in the arc c-c. The valve opens in the arc c-d and the containers are lled in the arc d-e. The valve is closed in the arc e-f, and the lled containers are lowered in the iirst part of the arc ,f-b and discharged at the point b.

The container shown permits the filling to commence while the container is substantially in collapsed condition but open sufficiently to admit the tapered filling spout. This serves to reduce the head space necessary in the container for `settling foam which would be produced by a relatively rapid illling rate. With either hand or mechanized filling it is merely necessary to slightly squeeze the body oi the container and the ap automatically opens. The nozzle is preferably of such shape that it completely illls the space between the walls and prevents the entrance of air.

In theordinary gravity milk bottle iillers in which vacuum is not employed, even` though the milk bottle has a very large orifice, the illling is relatively slow due to the need for getting rid of the air and the foam which gets out usually through a small center tube of the ller valve. When a smaller amount of foam is present than usual, the liquid draining down from the inside of this ller valve causes an overlilling of the bottle and imperfect seating of the cap. Where a vacuum is used to remove this air and foam, considerable extra joints and mechanism are required which not only add to the expense of the iiller but increase the difculty of sterilizing and scrubbing the parts between runs.

Even with the gravity filler, the small double orifice in the center of the filling valve, and which extends above the liquid level in the iiller bowl, presents a. very definite source of bacterial contamination due to thedimculty in cleaning.

With my present invention, the iiller nozzle,

seating closely around the opening in the contype with milk in three seconds through a /8" orice. Contrasted to this there is a minimum of eight and usually as much as eleven seconds required to iill the usual quart size container because of the use of a small nozzle or permit the foam to escape or settle.

The particular machine above described is merely one embodiment of my invention, and all of the details thereof may be modified 'within comparatively wide limits without departing from the scope of niv invention. The main features which are important are the provision oi means whereby the amount of liquid in each measuring chamber at the time the discharge valve is opened is determined by the degree of tilt of the chamber, thus avoiding the necessity for compensating mechanism, and the sealing of the container by the application of heat and pressure to the' ap.

Liquids varying in viscosity, meniscus characteristics and adhesion to chamber Walls, through comparatively wide limits may be employed, and by merely varying the tilt of the apparatus the correct amount of liquid will be delivered while the valve is open even though the measuring chamber may contain a considerably greater volume of one kind of a liquid than it does of a liquid of a different kind.

The mechanism for closing and sealing the containers shown in the accompanying drawings and above described, is claimed in divisional application, Serial No. 257,925, led February 23,A

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A filling machine including a liquid supply chamber, a measuring chamber having a iilling opening movable to positions below and above the liquid level in said supply chamber, and having a valve controlled discharge at the exterior of said supply chamber, means for tilting said measuring chamber to varying degrees to vary the volume of liquid retained by the measuring chamber when the filling opening is above the liquid level in the supply chamber, and means for opening said valve control discharge when said chamber reaches a predetermined point in its movement.

2. A filling machine having a supply chamber, an annular series of measuring chambers depending therefrom and having their open upper ends communicating with the interior of the supply chamber, means for maintaining a substantially constant liquid level within said supply chamber, means for rotating said ipply chamber and measuring chambers about an a`xis inclined to the vertical, whereby the upper ends of the measuring chambers move in succession below and above said liquid leveland means for varying the inclination of said axis to vary the volume of liquid retained by each measuring chamber as it moves above said liquid level.

3. A filling apparatus including a rotatable frame having an upper supply chamber, an annular series of measuring chambers having inlet openings communicating with the interior of said supply chamber and having discharge outlets below said supply chamber, means yfor rotating said supply chamber about an axis inclined to the vertical, means for maintaining a liquid level in said supply chamber such that the inlet openings of said measuring chambers move below and above said liquid level during the rotation oi said supply chamber about said axis, and means for varying the inclination of said axis to vary the( amount of liquid retained in each measuring chamber as it moves above said liquid level.

4. A filling machine including a supply chamber rotatable about an axis inclined in respect to the vertical, a plurality of conical measuring chambers each having its larger upper end opening through the bottom of said supply chamber, a valve for controlling the discharge from the smaller lower ends of said measuring chambers, means for maintaining a .liquid level within said supply chamber and below the uppermost part of the path of movement of the upper ends of said measuring chambers during the rotation of said supply chamber about said inclined axis, and means for varying the inclination of the axis of said supply chamber to control the amount of liquid retained in each measuring chamber.

5. A iilling machine including a supply chamber rotatable about an axis inclined in respect to the vertical, a plurality of conical measuring chambers each having its larger upper end opening through the bottom of said supply chamber, a valve for controlling the discharge from the smaller lower ends of said measuring chambers,

means for maintaining a liquid level within said supply chamber and below the uppermost part of the path of movement of the upper ends of said measuring chambers during the rotation of said supply chamber about said inclined axis, means forvarying the inclination of the axis of said supply chamber to control the amount of liquid retained in each measuring chamber, and a rotatable member for removing the filled containers and having its axis parallel to and tiltable with the axis of the supply chamber.

6. A filling machine including a supply chamber rotatable about an axis inclined in respect to the vertical, a plurality of conical measuring chambers each having its larger upper end opening through the bottom of said supply chamber, a valve for controlling the discharge from the smaller lower ends oi said measuring chambers, means for maintaining a liquid level within said supply chamber and below the uppermost part of the path of movement of the upper ends oi said measuring chambers during the rotation of said supply chamber about said inclined axis, and means for varying the inclination of the axis of said supply chamber to control the amount oi liquid retained in each measuring chamber.

7. A. lling apparatus including a rotatable frame having an upper supply chamber, an annular series of measuring chambers having inlet openings communicating with the interior of said supply chamber and having discharge outlets below said supply chamber. means for rotating said supply chamber about an axis inclined to the vertical, means for maintaining a liquid level in said supply chamber such' that the inlet openings of said measuring chambers move below and above said liquid level during the rotation of said supply chamber about said axis, means for varying the inclination of said axis tovary the amount of liquid retained ln each measuring chamber as it moves above said liquid level, and a rotatable member for removing the lled containers and having its axis parallel to and tiltable with the axis oi the supply chamber.

8. A yiilling apparatus including a rotatable frame having an upper supply chamber, an annular series of measuring chambers having inlet openings communicating with the interior of said supply `chamber' and having discharge outlets below said supply chamber, means for rotating said supply chamber about an axis inclined t0 the vertical, means for maintaining a liquid level in said supply chamber such that the inlet openings of said measuring chambers move below and above said liquid level during the rotation of said supply chamber about said axis, means the amount of liquid retained in each measuring chamber as it moves above said liquid level and means for vopening the discharge outlet of each chamber when the inlet is above the liquid level.

CLARENCE W. VOGT. 

